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1 /* 1
2 * Wireless Host Controller (WHC) hardware acc
3 *
4 * Copyright (C) 2007 Cambridge Silicon Radio
5 *
6 * This program is free software; you can redi
7 * modify it under the terms of the GNU Genera
8 * 2 as published by the Free Software Foundat
9 *
10 * This program is distributed in the hope tha
11 * but WITHOUT ANY WARRANTY; without even the
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR
13 * GNU General Public License for more details
14 *
15 * You should have received a copy of the GNU
16 * along with this program. If not, see <http
17 */
18 #include <linux/kernel.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/uwb/umc.h>
21
22 #include "../../wusbcore/wusbhc.h"
23
24 #include "whcd.h"
25
26 void whc_write_wusbcmd(struct whc *whc, u32 ma
27 {
28 unsigned long flags;
29 u32 cmd;
30
31 spin_lock_irqsave(&whc->lock, flags);
32
33 cmd = le_readl(whc->base + WUSBCMD);
34 cmd = (cmd & ~mask) | val;
35 le_writel(cmd, whc->base + WUSBCMD);
36
37 spin_unlock_irqrestore(&whc->lock, fla
38 }
39
40 /**
41 * whc_do_gencmd - start a generic command via
42 * @whc: the WHCI HC
43 * @cmd: command to start.
44 * @params: parameters for the command (the WU
45 * @addr: pointer to any data for the comman
46 * @len: length of the data (if any).
47 */
48 int whc_do_gencmd(struct whc *whc, u32 cmd, u3
49 {
50 unsigned long flags;
51 dma_addr_t dma_addr;
52 int t;
53 int ret = 0;
54
55 mutex_lock(&whc->mutex);
56
57 /* Wait for previous command to comple
58 t = wait_event_timeout(whc->cmd_wq,
59 (le_readl(whc->
60 WHC_GENCMD_TIME
61 if (t == 0) {
62 dev_err(&whc->umc->dev, "gener
63 le_readl(whc->base + W
64 le_readl(whc->base + W
65 ret = -ETIMEDOUT;
66 goto out;
67 }
68
69 if (addr) {
70 memcpy(whc->gen_cmd_buf, addr,
71 dma_addr = whc->gen_cmd_buf_dm
72 } else
73 dma_addr = 0;
74
75 /* Poke registers to start cmd. */
76 spin_lock_irqsave(&whc->lock, flags);
77
78 le_writel(params, whc->base + WUSBGENC
79 le_writeq(dma_addr, whc->base + WUSBGE
80
81 le_writel(WUSBGENCMDSTS_ACTIVE | WUSBG
82 whc->base + WUSBGENCMDSTS);
83
84 spin_unlock_irqrestore(&whc->lock, fla
85 out:
86 mutex_unlock(&whc->mutex);
87
88 return ret;
89 }
90
91 /**
92 * whc_hw_error - recover from a hardware erro
93 * @whc: the WHCI HC that broke.
94 * @reason: a description of the failure.
95 *
96 * Recover from broken hardware with a full re
97 */
98 void whc_hw_error(struct whc *whc, const char
99 {
100 struct wusbhc *wusbhc = &whc->wusbhc;
101
102 dev_err(&whc->umc->dev, "hardware erro
103 wusbhc_reset_all(wusbhc);
104 }
105
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